Display rack



FIG. 1 is a front side perspective view of the display rack;

FIG. 2 is a front view of the display rack;

FIG. 3 is a rear view of the display rack;

FIG. 4 is a left side view of the display rack;

FIG. 5 is a right side view of the display rack;

FIG. 6 is a top view of the display rack; and,

FIG. 7 is a bottom view of the display rack.

The dashed lines are provided for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a display rack, as shown and described. 